试题与答案

E载波是ITU-T建议的传输标准,其中E3信道的数据速率大约是 (11) Mb/s。

题型:单项选择题

题目:

E载波是ITU-T建议的传输标准,其中E3信道的数据速率大约是 (11) Mb/s。贝尔系统T3信道的数据速率大约是 (12) Mb/s。

(12)是()

A.1.5

B.6.3

C.44

D.274

答案:

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A.by giving her mother a call

B.when she stayed with her mother

C.from her brother’s call

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C.building a garden

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A.to say good bye to Mother

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B.the writer was kind and loved her mother

C.the writer’s mother didn’t like her sister

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